A nonS-locus F-box gene breaks self-incompatibility in diploid potatoes

文献类型： 外文期刊

第一作者： Ma, Ling

作者： Ma, Ling;Zhang, Bo;Tang, Fei;Li, Futing;Gao, Meng;Yang, Huiqin;Gao, Dongli;Li, Canhui;Shang, Yi;Zhang, Chunzhi;Liao, Qinggang;Tang, Die;Jia, Yuxin;Luo, Xuming;Lucas, William J.;Huang, Sanwen;Peng, Zhen;Guo, Han;Zhang, Jinzhe;Lucas, William J.

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.919； 五年影响因子：15.805 ）

ISSN： 2041-1723

年卷期： 2021 年 12 卷 1 期

页码：

收录情况： SCI

摘要： Potato is the third most important staple food crop. To address challenges associated with global food security, a hybrid potato breeding system, aimed at converting potato from a tuber-propagated tetraploid crop into a seed-propagated diploid crop through crossing inbred lines, is under development. However, given that most diploid potatoes are self-incompatible, this represents a major obstacle which needs to be addressed in order to develop inbred lines. Here, we report on a self-compatible diploid potato, RH89-039-16 (RH), which can efficiently induce a mating transition from self-incompatibility to self-compatibility, when crossed to self-incompatible lines. We identify the S-locusinhibitor (Sli) gene in RH, capable of interacting with multiple allelic variants of the pistil-specific S-ribonucleases (S-RNases). Further, Sli gene functions like a general S-RNase inhibitor, to impart SC to RH and other self-incompatible potatoes. Discovery of Sli now offers a path forward for the diploid hybrid breeding program. Diploid potatoes are typically self-incompatible, complicating efforts to breed diploid cultivars. Here the authors report map-based cloning of the S-locus inhibitor (Sli) gene in potato which encodes a non S-locus F-box protein that is expressed in pollen and can functions like a general S-RNase inhibitor to overcome self-incompatibility.

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